palisade parenchyma

American  

noun

Botany.

1. the upper layer of ground tissue in a leaf, consisting of elongated cells beneath and perpendicular to the upper epidermis and constituting the primary area of photosynthesis.

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Etymology

Origin of palisade parenchyma

First recorded in 1880–85

Example Sentences

A. Within the complex layered structure of a thin leaf, the largest share of the pigments involved in the color change is found in a type of cell near the top surface called palisade cells, or the palisade parenchyma.

From New York Times